An OpenCart (3.0.3.6) website was setup some years ago by developers that I am not able to get in touch with anymore... and for some reason more than half of the filters have disappeared on a seemingly random principle.
The website has around 10 filter categories most of which have a small number of entries in them, but one filter category has around 1200 entries.
The website administrator reports that after adding a new entry to this category more than half of the other filters disappeared (which I was able to confirm by looking at the database - only around 400 were left).
I am not an OpenCart expert... I looked at the code that corresponds to this action (saving the filters list - admin/catalog/model/filter -> editFilter() ) and compared it to a fresh OpenCart installation as I had doubts that the previous devs did something wrong - the code is the same, so we can exclude an issue with some custom code (I think...).
We were able to restore all of the filters as the website administrator had a backup, but now we are worried that adding even 1 filter to this category can break his website.
So my questions here are:
Any ideas would be greatly appreciated!
Thank you!
Found the issue after analysing the POST request a bit more:
The PHP version on the server was changed and (by default I guess) configured with max_input_vars=1000, which was the exact number of values contained in the POST request.
Setting a higher value in php.ini resolves the issue.